Uri García | Universidad Nacional Autónoma de México (original) (raw)

Papers by Uri García

Research paper thumbnail of New records and morphological variation of Rhadinaea marcellae Taylor, 1949 (Squamata, Colubridae) from Sierra Madre Oriental, Mxico

Check List, 2019

Rhadinaea marcellae Taylor, 1949 is known from only 12 specimens. Based on recent fieldwork and r... more Rhadinaea marcellae Taylor, 1949 is known from only 12 specimens. Based on recent fieldwork and research in scientific collections and databases, we report 14 new records of R. marcellae, bringing the total number of verified occurrences up to 26, updating our understanding of this secretive species’ distribution in the tropical and cloud forests of the Sierra Madre Oriental in Mexico. The new records come from the Mexican states of Hidalgo, Puebla, San Luis Potosí and Veracruz. All the newly reported specimens are morphologically concordant with R. marcellae, but exhibit noteworthy variation.

Research paper thumbnail of A new rare species of the Rhadinaea decorata group from the Sierra Madre del Sur of Guerrero, Mexico (Squamata, Colubridae)

ZooKeys, 2018

A new species of the Rhadinaeadecorata group is described based on two specimens from the Sierra ... more A new species of the Rhadinaeadecorata group is described based on two specimens from the Sierra Madre del Sur, Guerrero, Mexico. The new species differs from all other members of the genus Rhadinaea by having: eight supralabials; 149–151 (male) ventrals; 63–77 (male) subcaudals; two large pale nuchal blotches, forming an incomplete collar that occupies two scales laterally and is bissected along the dorsal midline; a postocular pale marking consisting of a well-defined, narrow line beginning behind the upper posterior margin of the eye and extending posteriorly nearly horizontally until connecting with the nuchal blotches; and the dark ground color of the flanks extending to the lateral portion of the ventrals. The large nuchal blotches distinguish the new species from the other members of the R.decorata group, except for R.cuneata and some individuals of R.hesperia (pale nuchal marking one-scale wide in R.marcellae, absent in the other species). The condition of the postocular pal...

Research paper thumbnail of Distribución geográfica de Scincella incerta (Squamata: Scincidae) en el estado de Chiapas, México

ACTA ZOOLÓGICA MEXICANA (N.S.), 2018

Se presentan nuevos registros de Sincella incerta en el estado de Chiapas y se confirma su presen... more Se presentan nuevos registros de Sincella incerta en el estado de Chiapas y se confirma su presencia en la región central del estado. Uno de los registros de las estribaciones costeras del sureste llena un espacio en la distribución de la especie entre registros anteriores de Chiapas y Guatemala.

Research paper thumbnail of Noteworthy records of amphibians and reptiles from Puebla, México

Research paper thumbnail of Molecular phylogeny of the subgenus Syrrhophus (Amphibia: Anura: Eleutherodactylidae), with the description of a new species from Eastern Mexico

Systematics and Biodiversity, 2022

The Eleutherodactylus subgenus Syrrhophus has a complex taxonomic history. For many years the spe... more The Eleutherodactylus subgenus Syrrhophus has a complex taxonomic history. For many years the species were classified into series and groups of species based on morphological and allozyme data. However, most of the species have conservative morphology, and their phylogenetic relationships have not been resolved. Furthermore, recent studies employing molecular tools have shown that Syrrhophus diversity is highly underestimated. Here, we present a near-complete phylogenetic hypothesis based on mitochondrial data (16S rRNA, cytochrome c oxidase subunit I, and cytochrome b) and employing maximum likelihood and Bayesian methods. The Bayesian tree has high support values (posterior probabilities ≥0.95) whereas the maximum likelihood hypothesis has generally low values (bootstrap support <70). Both phylogenetic analyses recovered Syrrhophus as monophyletic and composed of four main, allopatric clades (E. symingtoni clade, E. longipes clade, E. modestus clade, and E. nitidus clade) concordant with geography. Based on the molecular and morphological data, we describe a new species from the state of San Luis Potosí, Mexico. The new species is most closely related to E. campi and E. cystignathoides from which it has a genetic distance >7% in 16S rRNA. Finally, based on the phylogenetic results, we resurrect E. rubrimaculatus from synonymy. Our results increase the number of species in the subgenus Syrrhophus to 41. We highlight the importance of efforts to study this important component of Mexican biodiversity.

Research paper thumbnail of NUEVOS REGISTROS DE DISTRIBUCIÓN DE Micruroides euryxanthus australis Y Micruroides euryxanthus neglectus (SERPENTES: ELAPIDAE), Y SU DISTRIBUCIÓN POTENCIAL EN SINALOA, MÉXICO

Revista Latinoamericana de Herpetología, 2020

En un análisis de la distribución del género Micruroides de Sinaloa, México, se reportan nuevos r... more En un análisis de la distribución del género Micruroides de Sinaloa, México, se reportan nuevos registros estatales que aumentan el rango de distribución conocido de esta especie. Adicionalmente, evaluamos la distribución potencial en Sinaloa, de las dos subespecies que se distribuyen en el estado.

Research paper thumbnail of A partial molecular phylogeny of Rhadinaea and related genera (Squamata, Dipsadidae) with comments on the generic assignment of Rhadinaea eduardoi

ZooKeys, 2020

The genus Rhadinaea is a diverse clade of New World dipsadid snakes, with 22 species arranged in ... more The genus Rhadinaea is a diverse clade of New World dipsadid snakes, with 22 species arranged in six recognized species groups. The most recently described species, Rhadinaea eduardoi, was described based on a unique specimen collected in the Santa Catarina Juquila municipality in the Sierra Madre del Sur of southern Oaxaca, Mexico. Here, based on a reexamination of the holotype and the results of a phylogenetic analysis of the holotype of Rhadinaea eduardoi and representatives of several genera closely related to Rhadinaea, we reassessed the generic assignment of Rhadinaea eduardoi. In our phylogenetic hypothesis, R. eduardoi was nested within a strongly supported clade of Coniophanes fissidens samples, thus making Rhadinaea paraphyletic with respect to Coniophanes. Additionally, our reexamination of the holotype of Rhadinaea eduardoi revealed that the alleged presence of a subpreocular scale is only true on the right side of the head, and that this scale appears to be a malformed ...

Research paper thumbnail of Integrative species delimitation in practice: Revealing cryptic lineages within the short-nosed skink Plestiodon brevirostris (Squamata: Scincidae)

Molecular Phylogenetics and Evolution, 2018

Integrative taxonomy has been generally considered as a goal in systematics for more than a decad... more Integrative taxonomy has been generally considered as a goal in systematics for more than a decade. Here, we employed environmental, molecular, and morphological data to evaluate the species boundaries within the short-nosed skink Plestiodon brevirostris from south-central Mexico, one member of the morphologically conservative P. brevirostris group. Our molecular dataset includes one mitochondrial and two nuclear loci. The mitochondrial fragment includes the full length of the gene coding for the NADH dehydrogenase subunit 1 protein, a segment of the gene coding for 16S ribosomal RNA, and flanking tRNAs. The nuclear dataset includes fragments of the genes coding for the megakaryoblastic leukemia 1 and RNA fingerprint 35 proteins. We employed phylogenetic reconstruction, analyses of population structure and morphological variation, and species delimitation methods (including the integration of the three kinds of data in a unified probabilistic framework) to evaluate species limits. Our results suggest that P. brevirostris represents four distinct species. The information provided by each kind of data allowed us to discern between alternative explanations for the observed patterns of geographic structure. Two of the newly recognized lineages are poorly differentiated morphologically but apparently differ in environmental preferences and are allopatric. Additionally, one lineage is microendemic and parapatric with respect to another one. Moreover, our phylogenetic analyses suggest that other taxa within the P. brevirostris group may represent species complexes. We discuss our results in the context of integrative species delimitation.

Research paper thumbnail of La biodiversidad en Puebla estudio de estado

Research paper thumbnail of CROTALUS TRISERIATUS (Dusky rattlesnake): BODY TEMPERATURE. The

Herpetological Bulletin, 2008

Research paper thumbnail of Actualización del conocimiento de la fauna herpetológica en el estado de Puebla, México

Research paper thumbnail of New records of bee flies (Diptera, Bombyliidae) from Cuatro Ciénegas, Coahuila, Mexico

ZooKeys, 2014

Forty one new records of species of Bombyliidae are reported for Coahuila in northeastern Mexico.... more Forty one new records of species of Bombyliidae are reported for Coahuila in northeastern Mexico. Nine of these species are reported for the first time for the country. The specimens were collected in the Cuatro Ciénegas Basin and Sierra La Madera mountains during 2007-2013. The modified distributions of species are discussed. The gaps in the distribution of many species suggest an undersampling of this group of insects in the north of Mexico.

Research paper thumbnail of Evolutionary relationships amongst polymorphic direct-developing frogs in theCraugastor rhodopisSpecies Group (Anura: Craugastoridae)

Systematics and Biodiversity, 2014

ABSTRACT The Craugastor rhodopis Species Group includes two leaf-litter frog species (C. loki and... more ABSTRACT The Craugastor rhodopis Species Group includes two leaf-litter frog species (C. loki and C. rhodopis). These direct-developing frogs inhabit tropical regions of Mexico and northern Central America. Characterizing diversity within the group has been difficult due to high levels of phenotypic polymorphism within and between species. Because of these polymorphisms, each taxon has junior synonyms. Using a fragment of mitochondrial DNA (mtDNA), we investigated genetic diversity in the C. rhodopis Species Group. We then examined type specimens (including types of junior synonyms) to match nomenclature to geographically circumscribed genetic clusters. Our molecular analyses revealed four major lineages within the C. rhodopis Species Group: (1) a widely distributed clade in western Mexico, (2) a highland clade in eastern Mexico, (3) a widely distributed lowland clade occurring in eastern Mexico, Guatemala and El Salvador, and (4) a haplotype from Volc an San Mart ın in Veracruz, Mexico. We identified the first clade as C. occidentalis, a taxon currently placed in the ecologically similar but phylogenetically distant C. mexicanus Species Series. In light of this we place C. occidentalis in the C. rhodopis Species Group and designate a lectotype and paralectotype for the species. The second and third clades inhabiting eastern Mexico and northern Central America correspond to C. rhodopis and C. loki, respectively. Additionally, we examined the taxonomic distribution of certain colour pattern traits and compensatory mutations in Domain III of the mtDNA 12S ribosomal RNA gene. Our recovery of the divergent Veracruz haplotype and extensive mtDNA structure within species indicates that additional taxonomic revision will be necessary.

Research paper thumbnail of Biodiversidad de reptiles en México

Revista Mexicana de Biodiversidad, 2014

Based on a thorough analysis of the literature on reptiles associated with Mexico, and the review... more Based on a thorough analysis of the literature on reptiles associated with Mexico, and the review of databases, a detailed analysis of the distribution, richness and diversity of the reptiles from Mexico is presented. We estimate a total of 864 species of reptiles in Mexico, to October, 2013. Including 159 genera and 40 families; representing 8.7% of the reptiles of the world. Of the 864 species, 417 are lizards, 393 snakes, 48 turtles, 3 amphisbaenians and 3 crocodiles. There are 493 endemic species recorded for the country. The states with a greater number of species are: Oaxaca (262), Chiapas (220) and Veracruz (200), while states with a less diverse reptile fauna are: Tlaxcala (36 species), Distrito Federal (39) and Guanajuato (43).

Research paper thumbnail of A partial molecular phylogeny of Rhadinaea and related genera (Squamata, Dipsadidae) with comments on the generic assignment of Rhadinaea eduardoi

Citation: Palacios-Aguilar R, García-Vázquez UO (2020) A partial molecular phylogeny of Rhadinaea... more Citation: Palacios-Aguilar R, García-Vázquez UO (2020) A partial molecular phylogeny of Rhadinaea and related genera (Squamata, Dipsadidae) with comments on the generic assignment of Rhadinaea eduardoi. ZooKeys 943: 145-155. https://doi. Abstract The genus Rhadinaea is a diverse clade of New World dipsadid snakes, with 22 species arranged in six recognized species groups. The most recently described species, Rhadinaea eduardoi, was described based on a unique specimen collected in the Santa Catarina Juquila municipality in the Sierra Madre del Sur of southern Oaxaca, Mexico. Here, based on a reexamination of the holotype and the results of a phyloge-netic analysis of the holotype of Rhadinaea eduardoi and representatives of several genera closely related to Rhadinaea, we reassessed the generic assignment of Rhadinaea eduardoi. In our phylogenetic hypothesis, R. eduardoi was nested within a strongly supported clade of Coniophanes fissidens samples, thus making Rhadinaea paraphyletic with respect to Coniophanes. Additionally, our reexamination of the holotype of Rhadinaea eduardoi revealed that the alleged presence of a subpreocular scale is only true on the right side of the head, and that this scale appears to be a malformed preocular scale; also, a reduction in dorsal scale rows is present; and posterior enlarged maxillary teeth are grooved. Herein we consider that Rhadinaea eduardoi should be placed in the synonymy of Coniophanes fissidens. Consequently, we recognized only five species groups within the genus Rhadinaea.

Research paper thumbnail of Integrative species delimitation in practice: Revealing cryptic lineages within the short-nosed skink Plestiodon brevirostris (Squamata: Scincidae

Molecular Phylogenetics and Evolution, 2018

Integrative taxonomy has been generally considered as a goal in systematics for more than a decad... more Integrative taxonomy has been generally considered as a goal in systematics for more than a decade. Here, we employed environmental, molecular, and morphological data to evaluate the species boundaries within the short-nosed skink Plestiodon brevirostris from south-central Mexico, one member of the morphologically conservative P. brevirostris group. Our molecular dataset includes one mitochondrial and two nuclear loci. The mitochondrial fragment includes the full length of the gene coding for the NADH dehydrogenase subunit 1 protein, a segment of the gene coding for 16S ribosomal RNA, and flanking tRNAs. The nuclear dataset includes fragments of the genes coding for the megakaryoblastic leukemia 1 and RNA fingerprint 35 proteins. We employed phylogenetic reconstruction, analyses of population structure and morphological variation, and species delimitation methods (including the integration of the three kinds of data in a unified probabilistic framework) to evaluate species limits. Our results suggest that P. brevirostris represents four distinct species. The information provided by each kind of data allowed us to discern between alternative explanations for the observed patterns of geographic structure. Two of the newly recognized lineages are poorly differentiated morphologically but apparently differ in environmental preferences and are allopatric. Additionally, one lineage is microendemic and parapatric with respect to another one. Moreover, our phylogenetic analyses suggest that other taxa within the P. brevirostris group may represent species complexes. We discuss our results in the context of integrative species delimitation.

Research paper thumbnail of Distribución geográfica de Scincella incerta (Squamata: Scincidae) en el estado de Chiapas, México

Acta Zoológica Mexicana (nueva serie), 2018

Se presentan nuevos registros de Sincella incerta en el estado de Chiapas y se confirma su presen... more Se presentan nuevos registros de Sincella incerta en el estado de Chiapas y se confirma su presencia en la región central del estado. Uno de los registros de las estribaciones costeras del sureste llena un espacio en la distribución de la especie entre registros anteriores de Chiapas y Guatemala.
New records of Sincella incerta in Chiapas State are presented and its presence confirmed in the central region of the State. One of the records from the southeastern coastal foothills fills a gap in the distribution of the species between previous records from Chiapas and Guatemala.

Research paper thumbnail of Molecular systematics and historical biogeography of the genus Gerrhonotus (Squamata: Anguidae).

Research paper thumbnail of Natural History Notes. Thamnophis proximus (Western Ribbonsnake). Defensive behavior.

Research paper thumbnail of Geographic Distribution. Lampropeltis mexicana.

Research paper thumbnail of New records and morphological variation of Rhadinaea marcellae Taylor, 1949 (Squamata, Colubridae) from Sierra Madre Oriental, Mxico

Check List, 2019

Rhadinaea marcellae Taylor, 1949 is known from only 12 specimens. Based on recent fieldwork and r... more Rhadinaea marcellae Taylor, 1949 is known from only 12 specimens. Based on recent fieldwork and research in scientific collections and databases, we report 14 new records of R. marcellae, bringing the total number of verified occurrences up to 26, updating our understanding of this secretive species’ distribution in the tropical and cloud forests of the Sierra Madre Oriental in Mexico. The new records come from the Mexican states of Hidalgo, Puebla, San Luis Potosí and Veracruz. All the newly reported specimens are morphologically concordant with R. marcellae, but exhibit noteworthy variation.

Research paper thumbnail of A new rare species of the Rhadinaea decorata group from the Sierra Madre del Sur of Guerrero, Mexico (Squamata, Colubridae)

ZooKeys, 2018

A new species of the Rhadinaeadecorata group is described based on two specimens from the Sierra ... more A new species of the Rhadinaeadecorata group is described based on two specimens from the Sierra Madre del Sur, Guerrero, Mexico. The new species differs from all other members of the genus Rhadinaea by having: eight supralabials; 149–151 (male) ventrals; 63–77 (male) subcaudals; two large pale nuchal blotches, forming an incomplete collar that occupies two scales laterally and is bissected along the dorsal midline; a postocular pale marking consisting of a well-defined, narrow line beginning behind the upper posterior margin of the eye and extending posteriorly nearly horizontally until connecting with the nuchal blotches; and the dark ground color of the flanks extending to the lateral portion of the ventrals. The large nuchal blotches distinguish the new species from the other members of the R.decorata group, except for R.cuneata and some individuals of R.hesperia (pale nuchal marking one-scale wide in R.marcellae, absent in the other species). The condition of the postocular pal...

Research paper thumbnail of Distribución geográfica de Scincella incerta (Squamata: Scincidae) en el estado de Chiapas, México

ACTA ZOOLÓGICA MEXICANA (N.S.), 2018

Se presentan nuevos registros de Sincella incerta en el estado de Chiapas y se confirma su presen... more Se presentan nuevos registros de Sincella incerta en el estado de Chiapas y se confirma su presencia en la región central del estado. Uno de los registros de las estribaciones costeras del sureste llena un espacio en la distribución de la especie entre registros anteriores de Chiapas y Guatemala.

Research paper thumbnail of Noteworthy records of amphibians and reptiles from Puebla, México

Research paper thumbnail of Molecular phylogeny of the subgenus Syrrhophus (Amphibia: Anura: Eleutherodactylidae), with the description of a new species from Eastern Mexico

Systematics and Biodiversity, 2022

The Eleutherodactylus subgenus Syrrhophus has a complex taxonomic history. For many years the spe... more The Eleutherodactylus subgenus Syrrhophus has a complex taxonomic history. For many years the species were classified into series and groups of species based on morphological and allozyme data. However, most of the species have conservative morphology, and their phylogenetic relationships have not been resolved. Furthermore, recent studies employing molecular tools have shown that Syrrhophus diversity is highly underestimated. Here, we present a near-complete phylogenetic hypothesis based on mitochondrial data (16S rRNA, cytochrome c oxidase subunit I, and cytochrome b) and employing maximum likelihood and Bayesian methods. The Bayesian tree has high support values (posterior probabilities ≥0.95) whereas the maximum likelihood hypothesis has generally low values (bootstrap support <70). Both phylogenetic analyses recovered Syrrhophus as monophyletic and composed of four main, allopatric clades (E. symingtoni clade, E. longipes clade, E. modestus clade, and E. nitidus clade) concordant with geography. Based on the molecular and morphological data, we describe a new species from the state of San Luis Potosí, Mexico. The new species is most closely related to E. campi and E. cystignathoides from which it has a genetic distance >7% in 16S rRNA. Finally, based on the phylogenetic results, we resurrect E. rubrimaculatus from synonymy. Our results increase the number of species in the subgenus Syrrhophus to 41. We highlight the importance of efforts to study this important component of Mexican biodiversity.

Research paper thumbnail of NUEVOS REGISTROS DE DISTRIBUCIÓN DE Micruroides euryxanthus australis Y Micruroides euryxanthus neglectus (SERPENTES: ELAPIDAE), Y SU DISTRIBUCIÓN POTENCIAL EN SINALOA, MÉXICO

Revista Latinoamericana de Herpetología, 2020

En un análisis de la distribución del género Micruroides de Sinaloa, México, se reportan nuevos r... more En un análisis de la distribución del género Micruroides de Sinaloa, México, se reportan nuevos registros estatales que aumentan el rango de distribución conocido de esta especie. Adicionalmente, evaluamos la distribución potencial en Sinaloa, de las dos subespecies que se distribuyen en el estado.

Research paper thumbnail of A partial molecular phylogeny of Rhadinaea and related genera (Squamata, Dipsadidae) with comments on the generic assignment of Rhadinaea eduardoi

ZooKeys, 2020

The genus Rhadinaea is a diverse clade of New World dipsadid snakes, with 22 species arranged in ... more The genus Rhadinaea is a diverse clade of New World dipsadid snakes, with 22 species arranged in six recognized species groups. The most recently described species, Rhadinaea eduardoi, was described based on a unique specimen collected in the Santa Catarina Juquila municipality in the Sierra Madre del Sur of southern Oaxaca, Mexico. Here, based on a reexamination of the holotype and the results of a phylogenetic analysis of the holotype of Rhadinaea eduardoi and representatives of several genera closely related to Rhadinaea, we reassessed the generic assignment of Rhadinaea eduardoi. In our phylogenetic hypothesis, R. eduardoi was nested within a strongly supported clade of Coniophanes fissidens samples, thus making Rhadinaea paraphyletic with respect to Coniophanes. Additionally, our reexamination of the holotype of Rhadinaea eduardoi revealed that the alleged presence of a subpreocular scale is only true on the right side of the head, and that this scale appears to be a malformed ...

Research paper thumbnail of Integrative species delimitation in practice: Revealing cryptic lineages within the short-nosed skink Plestiodon brevirostris (Squamata: Scincidae)

Molecular Phylogenetics and Evolution, 2018

Integrative taxonomy has been generally considered as a goal in systematics for more than a decad... more Integrative taxonomy has been generally considered as a goal in systematics for more than a decade. Here, we employed environmental, molecular, and morphological data to evaluate the species boundaries within the short-nosed skink Plestiodon brevirostris from south-central Mexico, one member of the morphologically conservative P. brevirostris group. Our molecular dataset includes one mitochondrial and two nuclear loci. The mitochondrial fragment includes the full length of the gene coding for the NADH dehydrogenase subunit 1 protein, a segment of the gene coding for 16S ribosomal RNA, and flanking tRNAs. The nuclear dataset includes fragments of the genes coding for the megakaryoblastic leukemia 1 and RNA fingerprint 35 proteins. We employed phylogenetic reconstruction, analyses of population structure and morphological variation, and species delimitation methods (including the integration of the three kinds of data in a unified probabilistic framework) to evaluate species limits. Our results suggest that P. brevirostris represents four distinct species. The information provided by each kind of data allowed us to discern between alternative explanations for the observed patterns of geographic structure. Two of the newly recognized lineages are poorly differentiated morphologically but apparently differ in environmental preferences and are allopatric. Additionally, one lineage is microendemic and parapatric with respect to another one. Moreover, our phylogenetic analyses suggest that other taxa within the P. brevirostris group may represent species complexes. We discuss our results in the context of integrative species delimitation.

Research paper thumbnail of La biodiversidad en Puebla estudio de estado

Research paper thumbnail of CROTALUS TRISERIATUS (Dusky rattlesnake): BODY TEMPERATURE. The

Herpetological Bulletin, 2008

Research paper thumbnail of Actualización del conocimiento de la fauna herpetológica en el estado de Puebla, México

Research paper thumbnail of New records of bee flies (Diptera, Bombyliidae) from Cuatro Ciénegas, Coahuila, Mexico

ZooKeys, 2014

Forty one new records of species of Bombyliidae are reported for Coahuila in northeastern Mexico.... more Forty one new records of species of Bombyliidae are reported for Coahuila in northeastern Mexico. Nine of these species are reported for the first time for the country. The specimens were collected in the Cuatro Ciénegas Basin and Sierra La Madera mountains during 2007-2013. The modified distributions of species are discussed. The gaps in the distribution of many species suggest an undersampling of this group of insects in the north of Mexico.

Research paper thumbnail of Evolutionary relationships amongst polymorphic direct-developing frogs in theCraugastor rhodopisSpecies Group (Anura: Craugastoridae)

Systematics and Biodiversity, 2014

ABSTRACT The Craugastor rhodopis Species Group includes two leaf-litter frog species (C. loki and... more ABSTRACT The Craugastor rhodopis Species Group includes two leaf-litter frog species (C. loki and C. rhodopis). These direct-developing frogs inhabit tropical regions of Mexico and northern Central America. Characterizing diversity within the group has been difficult due to high levels of phenotypic polymorphism within and between species. Because of these polymorphisms, each taxon has junior synonyms. Using a fragment of mitochondrial DNA (mtDNA), we investigated genetic diversity in the C. rhodopis Species Group. We then examined type specimens (including types of junior synonyms) to match nomenclature to geographically circumscribed genetic clusters. Our molecular analyses revealed four major lineages within the C. rhodopis Species Group: (1) a widely distributed clade in western Mexico, (2) a highland clade in eastern Mexico, (3) a widely distributed lowland clade occurring in eastern Mexico, Guatemala and El Salvador, and (4) a haplotype from Volc an San Mart ın in Veracruz, Mexico. We identified the first clade as C. occidentalis, a taxon currently placed in the ecologically similar but phylogenetically distant C. mexicanus Species Series. In light of this we place C. occidentalis in the C. rhodopis Species Group and designate a lectotype and paralectotype for the species. The second and third clades inhabiting eastern Mexico and northern Central America correspond to C. rhodopis and C. loki, respectively. Additionally, we examined the taxonomic distribution of certain colour pattern traits and compensatory mutations in Domain III of the mtDNA 12S ribosomal RNA gene. Our recovery of the divergent Veracruz haplotype and extensive mtDNA structure within species indicates that additional taxonomic revision will be necessary.

Research paper thumbnail of Biodiversidad de reptiles en México

Revista Mexicana de Biodiversidad, 2014

Based on a thorough analysis of the literature on reptiles associated with Mexico, and the review... more Based on a thorough analysis of the literature on reptiles associated with Mexico, and the review of databases, a detailed analysis of the distribution, richness and diversity of the reptiles from Mexico is presented. We estimate a total of 864 species of reptiles in Mexico, to October, 2013. Including 159 genera and 40 families; representing 8.7% of the reptiles of the world. Of the 864 species, 417 are lizards, 393 snakes, 48 turtles, 3 amphisbaenians and 3 crocodiles. There are 493 endemic species recorded for the country. The states with a greater number of species are: Oaxaca (262), Chiapas (220) and Veracruz (200), while states with a less diverse reptile fauna are: Tlaxcala (36 species), Distrito Federal (39) and Guanajuato (43).

Research paper thumbnail of A partial molecular phylogeny of Rhadinaea and related genera (Squamata, Dipsadidae) with comments on the generic assignment of Rhadinaea eduardoi

Citation: Palacios-Aguilar R, García-Vázquez UO (2020) A partial molecular phylogeny of Rhadinaea... more Citation: Palacios-Aguilar R, García-Vázquez UO (2020) A partial molecular phylogeny of Rhadinaea and related genera (Squamata, Dipsadidae) with comments on the generic assignment of Rhadinaea eduardoi. ZooKeys 943: 145-155. https://doi. Abstract The genus Rhadinaea is a diverse clade of New World dipsadid snakes, with 22 species arranged in six recognized species groups. The most recently described species, Rhadinaea eduardoi, was described based on a unique specimen collected in the Santa Catarina Juquila municipality in the Sierra Madre del Sur of southern Oaxaca, Mexico. Here, based on a reexamination of the holotype and the results of a phyloge-netic analysis of the holotype of Rhadinaea eduardoi and representatives of several genera closely related to Rhadinaea, we reassessed the generic assignment of Rhadinaea eduardoi. In our phylogenetic hypothesis, R. eduardoi was nested within a strongly supported clade of Coniophanes fissidens samples, thus making Rhadinaea paraphyletic with respect to Coniophanes. Additionally, our reexamination of the holotype of Rhadinaea eduardoi revealed that the alleged presence of a subpreocular scale is only true on the right side of the head, and that this scale appears to be a malformed preocular scale; also, a reduction in dorsal scale rows is present; and posterior enlarged maxillary teeth are grooved. Herein we consider that Rhadinaea eduardoi should be placed in the synonymy of Coniophanes fissidens. Consequently, we recognized only five species groups within the genus Rhadinaea.

Research paper thumbnail of Integrative species delimitation in practice: Revealing cryptic lineages within the short-nosed skink Plestiodon brevirostris (Squamata: Scincidae

Molecular Phylogenetics and Evolution, 2018

Integrative taxonomy has been generally considered as a goal in systematics for more than a decad... more Integrative taxonomy has been generally considered as a goal in systematics for more than a decade. Here, we employed environmental, molecular, and morphological data to evaluate the species boundaries within the short-nosed skink Plestiodon brevirostris from south-central Mexico, one member of the morphologically conservative P. brevirostris group. Our molecular dataset includes one mitochondrial and two nuclear loci. The mitochondrial fragment includes the full length of the gene coding for the NADH dehydrogenase subunit 1 protein, a segment of the gene coding for 16S ribosomal RNA, and flanking tRNAs. The nuclear dataset includes fragments of the genes coding for the megakaryoblastic leukemia 1 and RNA fingerprint 35 proteins. We employed phylogenetic reconstruction, analyses of population structure and morphological variation, and species delimitation methods (including the integration of the three kinds of data in a unified probabilistic framework) to evaluate species limits. Our results suggest that P. brevirostris represents four distinct species. The information provided by each kind of data allowed us to discern between alternative explanations for the observed patterns of geographic structure. Two of the newly recognized lineages are poorly differentiated morphologically but apparently differ in environmental preferences and are allopatric. Additionally, one lineage is microendemic and parapatric with respect to another one. Moreover, our phylogenetic analyses suggest that other taxa within the P. brevirostris group may represent species complexes. We discuss our results in the context of integrative species delimitation.

Research paper thumbnail of Distribución geográfica de Scincella incerta (Squamata: Scincidae) en el estado de Chiapas, México

Acta Zoológica Mexicana (nueva serie), 2018

Se presentan nuevos registros de Sincella incerta en el estado de Chiapas y se confirma su presen... more Se presentan nuevos registros de Sincella incerta en el estado de Chiapas y se confirma su presencia en la región central del estado. Uno de los registros de las estribaciones costeras del sureste llena un espacio en la distribución de la especie entre registros anteriores de Chiapas y Guatemala.
New records of Sincella incerta in Chiapas State are presented and its presence confirmed in the central region of the State. One of the records from the southeastern coastal foothills fills a gap in the distribution of the species between previous records from Chiapas and Guatemala.

Research paper thumbnail of Molecular systematics and historical biogeography of the genus Gerrhonotus (Squamata: Anguidae).

Research paper thumbnail of Natural History Notes. Thamnophis proximus (Western Ribbonsnake). Defensive behavior.

Research paper thumbnail of Geographic Distribution. Lampropeltis mexicana.